I strongly believe you should be able to change the text size by entering in a number rather than having to use a slider that takes minuscule adjustments to reach the same size as other text boxes. As a graphic designer designs feel more complete when each box can line up perfectly.

The poster should be of really high resolution so that we can print it to big sizes without any disortion. Plus, an option to add an independent image because whenever i add any jpeg image it is added to a part which is not enough customisable or movable or scalable.

When you've created a layout you already love, and want to keep things consistent for materials, it helps to have the ability to save your work as a template, maybe even share it with friends who like to create content using your style.